X50
Installation and Operation Manual
83
DTS Neural Loudness Control
Overview
The X50 offers two program channels of DTS Neural Loudness Control—a loudness leveling
device that uses advanced psycho-acoustic and signal processing techniques to accurately
detect and regulate the perceived loudness of stereo and 5.1 sources. Using this feature,
you can regulate audio without creating the perception of being “squashed” or
compressed.
One of the important aspects of loudness control is
frequency compensation
, also known as
loudness shaping. Loudness studies dating back to Fletcher/Munson in the 1930s found
that the human ear is more sensitive to different frequencies at different loudness levels.
The
Loudness Shaping
(
Frequency Compensation
) parameter preserves the same
perceptual frequency balance as the input signal, while correcting the loudness to match a
desired
Target Level.
For example, with
Loudness Shaping
enabled at a medium level, signals that fall below
the
Target Level
setting have more gain added to middle frequencies than higher or lower
frequencies. This preserves the original spectral balance. Conversely, signals that fall above
the
Target Level
setting will have middle frequencies attenuated more than higher or
lower frequencies. Because the
Loudness Shaping
parameter applies less gain to high and
low frequencies, high or low frequency noise does not become over-emphasized.
Figure 4-6.
DTS Neural Loudness Control Block Diagram
Summary of Contents for Selenio X50
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Page 14: ...Preface Safety xiv...
Page 18: ...Chapter 1 Introduction 4 Front and Back Views Figure 1 1 Front and Back Views...
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